Because some people put work into their sims and builds. It is not fair to the creator, plain and simple.
If I download a female sim, change her daytime outfit from red to black and re-upload it as my own, thats not right. Someone else spent their time, their creativity and their effort into making her, not me. Now, if I take that same sim, change her make-up, her skintone, her hair color, her traits, her name ... that is different. I used my time, my creativity to make her as I needed. Upload her away as she has been changed.
Same with a build. If I download a restaurant and I just change the color of the seats and upload it. Thats wrong. Someone had their design, their idea, their creativity, their time to build it, name it, hopefully check it to make sure it is working. They should be credited for the time that they spent. If I take that same restaurant, cause I like the look of the outer building shell, gut the inside, change the bricks on the outside and re-build it as to fit my game ... that is different, it is my time that I used, not someone elses.
It isn't about the sim or the building, it was that persons time. To have someone else take something they made, change one thing ( if that much ) and reload it back as their own tells that person who made it their time meant nothing.
